SciELO - Scientific Electronic Library Online

vol.47 issue1-2Morfogénesis de la fase sexual de seis especies mexicanas de helechos del género Dryopteris (Dryopteridaceae)Morfología y anatomía del gametofito de Didymochlaena truncatula (Dryopteridaceae) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista de Biología Tropical

On-line version ISSN 0034-7744Print version ISSN 0034-7744


MENDOZA, Aniceto; PEREZ-GARCIA, Blanca  and  RIBA, Ramón. Desarrollo protálico de Lygodium heterodoxum y Lygodium venustum (Schizaeaceae) . Rev. biol. trop [online]. 1999, vol.47, n.1-2, pp.83-92. ISSN 0034-7744.

The development of the gametophytes of Lygodium heterodoxum Kunze and Lygodium venustum Sw. is described on the basis of spores collected in the States of Veracruz and Sinaloa, México. The germination of the spores is of the Vittaria-type or Lygodium-type. Prothallial development is of the Adiantum-type with transition to Ceratopteris-type. The gametangia are the usual for leptosporangiate ferns. The first leaf of the sporophyte appeared 85 days after spore sowing; it is digitate-flabelliform, with unicellular club shaped trichomes in margin and both surfaces, and the stomata anomocytic. Unisexual gametophytes (only with antheridia or archegonia) were found in the cultures, so the presence of hormonal substances with "antheridogenic effects" is suggested.

Keywords : Gametophyte; germination; Lygodium,; México,; morphology; prothallus; Schizaeaceae..

        · abstract in Spanish     · text in Spanish


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License